Questions tagged [raid]

Redundant array of independent/inexpensive disks; a technology which utilizes multiple disks to provide increased reliability, performance, and/or redundancy. Can be implemented either in software or with a hardware controller.

Filter by
Sorted by
Tagged with
1 vote
2 answers
2k views

RAID degraded, partitions missing

We're having a very weird issue at work. Our Ubuntu server has 6 drives, set up with RAID1 as follows: /dev/md0, consisting of: /dev/sda1 /dev/sdb1 /dev/md1, consisting of: /dev/sda2 /dev/sdb2 /dev/...
reano's user avatar
  • 11
1 vote
1 answer
1k views

FreeNAS planning - RAID controllers & expanding volumes

I'm considering building a FreeNAS box to replace a Synology DS1511 - mainly because I'd like it as a project with more flexibility. Couple questions: 1. Most people recommend a hardware RAID ...
Pat's user avatar
  • 11
2 votes
1 answer
761 views

Test RAID array read write speeds from boot disk

I have a VMware ESXi server with a local RAID 5 datastore formatted with VMFS. The RAID controller is a DELL PERC H710 hardware controller and the server is an R620. I get abysmal write speeds, ...
Gregg Leventhal's user avatar
1 vote
1 answer
1k views

Raid5 reconstruction is extremely slow

Three days ago added another drive to my RAID5 array with 3 drives, each drive is 4TB. Since then than only 42% has been completed MegaCli64 -LDRecon ShowProg L0 -a0 ...
user2783132's user avatar
  • 1,837
0 votes
1 answer
9k views

How to enlarge RAID5 array with MegaRAID WebBIOS?

I'm a little confused with RAID5. I created a RAID5 array group from WebBIOS with 6 drives. Then created an XFS partition on this RAID5 drive. How can I enlarge the RAID5 without losing data? In ...
rkvmyizs's user avatar
0 votes
1 answer
1k views

WD MBWE II (White Strip Light) 2TB - unable to access data

I have a WD MBWE II (White Strip Light) 2TB - (WD20000H2NC-00) Was working fine until a few days ago. I guess there was a power failure and after that I am unable to access the 'Public' or the '...
user210477's user avatar
0 votes
1 answer
114 views

How can I get my SATA DVDs working again?

My hard drive crashed (WinXPpro), so I took a C drive from a broken PC. The new C drive is Win7pro. Motherboard is MSI K8N Neo4 Platinum, with 4 hard drives installed on SATA 1-4 (nForce4 Ultra); ...
user269051's user avatar
1 vote
1 answer
363 views

Troubleshooting major performance issue: Is culprit Intel RST, Hard drive, or something else?

The Setup I have the following components that come into play in this situation: ASUS P8Z68 V/PRO motherboard a RAID1 configuration (1x 1TB drive, 1 x 2TB drive -- I explain below), accelerated with ...
SeanKilleen's user avatar
  • 2,402
2 votes
1 answer
2k views

Faster SSD performance as cache drive or regular boot drive?

I have the choice of setting up a system: with two SSD Drives in RAID 1 mode as my boot drive for Windows 7 64-bit, with the Program Files and User folders moved to a second regular hard drive, also ...
RS Conley's user avatar
  • 151
0 votes
1 answer
2k views

Ubuntu failed to detect MegaRaid lsi

Ubuntu(12.04) doesn't see HDS connected to MegaRaid. I have tried upgrading the framework, installed the driver, verified it was installed, rebooted the system and still don't see the drives connected ...
user2783132's user avatar
  • 1,837
2 votes
1 answer
3k views

Home ZFS based NAS...What processor/chipset to use? [closed]

So, I'm building a home/personal NAS. My plan is to expose both SMB fileshares for sharing files/media between hosts, but also to carve an iSCSI target LUN out of it for use by VMWare as a datastore. ...
MrBlargityBlarg's user avatar
0 votes
1 answer
86 views

Three disk (possibly RAID) data recovery

I have on my desk three 160 GB disks that were once part of an HP Proliant Windows 2003 Server. They may have been part of a RAID configuration of some sort. They may or may not be damaged in some way....
Martin's user avatar
  • 103
1 vote
1 answer
42 views

Non Raid - Symbolic links

I have 3x 3TB drives and 2x 1TB drives. I want to use all drives without RAID, but to be shown as a single volume. So that if a drive fails only the information on that failed drive will be lost. ...
Lucas's user avatar
  • 11
0 votes
1 answer
2k views

ASUS P5B Plus motherboard - no any drives found - how to restore RAID array?

We have a small server machine with an ASUS P5B Plus motherboard and 4 SATA HDDs. The HDDs were configured in a RAID10 array. Up until now, everything worked fine, but now the system doesn't recognize ...
Moha's user avatar
  • 141
0 votes
1 answer
247 views

Could I have destroyed Partitioning-Scheme/Filesystem of HDDs with External Harddrive Case with builtin Raid-Controller?

I had just recently bought a Fantec QB-35US3R to have a nice box on my desk to make some backups to. Along with the HDD-Bay I had ordered some 4TB HDDs to let them run in Raid 5, which is handled by ...
Senkaku's user avatar
  • 602
0 votes
1 answer
220 views

Splitting a drive which has layout as mirrored and type as dynamic

I have a C drive/volume in my server with layout = mirror and type =dynamic and status as healthy(boot,pagefile,crashdump). I have some questions regarding this configuration: I think it is a raid ...
shiva's user avatar
  • 31
6 votes
2 answers
4k views

Use the speed of an SSD + two HDDs in RAID 1

Is it possible to gain a speed benefit of an SSD if you create a software RAID with a big SSD + two small HDDs? At the moment I have a system with only two 320GB HDDs. And I thought about inserting a ...
rubo77's user avatar
  • 4,900
3 votes
2 answers
19k views

How to remove a hard drive from an Intel RST RAID configuration?

Background I'm on a Windows 8 machine. I had 2 x 1 TB HDDs in a RAID1 configuration utilizing the Intel RST software. One of the HDDs went bad according to Intel's RST application I removed the hard ...
SeanKilleen's user avatar
  • 2,402
1 vote
0 answers
1k views

Power loss during mdadm RAID level change

As per the title, my mdadm RAID was in the process of migrating from level 6 to 5 when the power cut out momentarily. Unfortunately I am no longer able to reassemble the array - the assemble command ...
Scott's user avatar
  • 31
4 votes
1 answer
843 views

For raid1, does btrfs check which partitions are on the same device?

I have btrfs on two partitions using btrfs's raid1 mode: /dev/sda3 /dev/sdb3 Now I plan to run btrfs device add /dev/sda2 /dev/sdb2, so I'll have four partitions: /dev/sda2 /dev/sda3 /dev/sdb2 /dev/...
James Cook's user avatar
1 vote
2 answers
4k views

Raid0 assemble disk again?

Our server recently suffered a disk failure, so our hosting provider put a new Disk in with CentOS so we can login and see if we can recover the data. We had 2 x 120 GB SSD drives in software RAID0 ...
Latheesan's user avatar
  • 153
1 vote
1 answer
5k views

RAID1 w/Intel RST -- can I replace failed drive with bigger drive?

The Setup I have 2 x 1TB drives in a RAID1 configuration. One of the hard drives has failed and so my RAID situation is degraded. All data is backed up via Backblaze as well so I'm not worried about ...
SeanKilleen's user avatar
  • 2,402
0 votes
1 answer
216 views

Unknown RAID Recovery?

I have an uncommon situation. I work as as IT administrator, I recently came across a box of ten hard drives that came from a company that we purchased a few years ago (before I started with this ...
Stuart's user avatar
  • 1
0 votes
0 answers
492 views

Forgot to turn on RAID after flashing bios, now have, but can't boot

I was having BSOD issues with my Windows 7, RAID 1 (Intel RST) machine and so decided to flash to the newest Asus BIOS. I think that part went well, but when reconfiguring the BIOS I neglected to ...
meridian's user avatar
1 vote
1 answer
2k views

How to undo accidental RAID initalization operation (recover data)? [duplicate]

Summary of the problem: I have two disks re-configured as RAID 1. instead of copying the data to the empty disk, it deleted the data from the non-empty disk. Here's what happened: 1. In the last few ...
Omeriko's user avatar
  • 139
0 votes
1 answer
83 views

Virtual lab hardware and HDDs

I have a bulk of HDDs (10) and i want to build virtual lab on Hyper-V.I have gigabyte motherboard on Z77 chipset with 4 sata2 and 2 sata3 ports, and intel build-in RAID controller. Now I am looking ...
ko4evneg's user avatar
  • 525
1 vote
1 answer
579 views

Harddisk life span Striping vs Spanning

Will striping two disks reduce life span of a disk due to increased write load compared to spanning where the disks are filled one by one?
Daniel's user avatar
  • 577
1 vote
1 answer
75 views

Rackmount HDD storage [closed]

Looking into some storage solutions for a small server. I've got a Mac mini running OS X server providing open directory accounts for all my machines (which are 98% OS X save two Windows machines). ...
ScottMcGready's user avatar
3 votes
1 answer
570 views

Independence of SATA channels and ports

I'm working on setting up a simple RAID and am wondering about how independent my SATA ports really are. There are 4 ports on the motherboard, but lspci shows only two controllers 00:0e.0 IDE ...
Benjamin Pritchard's user avatar
4 votes
2 answers
1k views

Is it currently stable to use, and boot to, a btrfs RAID 0 on SSDs?

As of the current (3.10+) Linux kernels, is it supported to make a btrfs RAID 0 out of SSDs the root mount and boot to it? This comprises several issues: Does the RAID 0 with SSDs support TRIM/...
Andrew Mao's user avatar
  • 1,211
0 votes
1 answer
153 views

How do I prevent anacron from running certain scripts?

I am running RHEL5 and software RAID (mdadm). Currently I allow the 99-raid-check weekly cron script to run at the normal time (early Sunday morning). However, if the system is off during that time it ...
SteveR's user avatar
  • 3
1 vote
0 answers
62 views

A few questions about windows 7 snapshots

I have been googling a while, but I am a bit confused about Microsoft VSS technology. Currently I am running Windows 7 Enterprise 64bit - everything patched to the latest versions. My system has one ...
Matthias Güntert's user avatar
4 votes
3 answers
80k views

How do I tell my PC's RAID configuration

EDIT Just a quick reword of my original question... Using Windows XP how do I determine which disks/drives/partitions are under the control of of my hardware RAID1 system? My original question: My ...
Doug's user avatar
  • 143
1 vote
2 answers
3k views

HDD + SSD Raid 0, does it make sense?

On my laptop, I have a 22GB SSD and a 500GB HDD. I just reinstalled Windows and because of some problems, I reset everything in Intel RST. In the end I ended up using a 44GB Raid 0 partition, but now ...
hattenn's user avatar
  • 477
0 votes
1 answer
91 views

creating new raid 5 volume

I recently purchased and installed a HighPoint HIRR2640X4SG RAID Controller card. I installed three 2 TB hard drives, and created the array: I booted and went into Disk Management in WHS 2011. I was ...
Kermit's user avatar
  • 169
7 votes
4 answers
860 views

One of two RAID 1s is not recognized in Ubuntu 13.04

I have a 256GB SSD (Ubuntu/Win8), and two 1TB drives in RAID 1. The problem is that I just recently added another two drives that are 4TB in RAID 1 but they aren't detected in Ubuntu as one drive but ...
Tek's user avatar
  • 509
0 votes
1 answer
2k views

Can I emulate a NAS OS on Windows 7 with an extra network adpter?

I want to setup a RAID NAS but I don't want to buy another computer or lose the game library of my Windows i7 system. Therefore, I'm wondering if you could just use an emulator to run a NAS OS in the ...
Richard's user avatar
  • 13
0 votes
1 answer
186 views

Replace two hard drives for one new hard drive do I have to change the RAID setting?

I have an old very usable Sony VAIO AR 590E. It was getting a bit sluggish so I reinstalled the OS (vista) and I replaced both both hard drives with a single solid-state hard drive (Samsung). Have ...
Josh's user avatar
  • 1
1 vote
1 answer
107 views

Concept for a USB RAID system by means of switch [closed]

I'm planning a domestic USB RAID system. My ideal design would be something like this: USB 3.0 _____________________________________ -----------1 [] [] [] [] [] [] [] [] |___ AV in case ...
Whimusical's user avatar
1 vote
2 answers
1k views

XFS in-memory corruption after hibernate

I am constantly getting the below errors with XFS filesystem present on software raid-1 which was then converted to 3-disk raid-5. Errors happen exclusively after hibernate, normally either ...
ZyX's user avatar
  • 263
2 votes
1 answer
9k views

Can't install windows - setup can't see my hard disk (RAID1)

I am trying to install win8 x64 on my machine. The machine has two hard drives connected in RAID1 I have just created : image I have inserted the USB containing the Windows installation media and ...
checho's user avatar
  • 268
0 votes
1 answer
711 views

Synology hybrid RAID

I thinking about buying Synology NAS. I prefer to have, for example, two discs (1 TB), but only part of them used as mirrored (protected) storage. For example 200 GB of both discs used as 200 GB ...
Seith's user avatar
  • 3
2 votes
1 answer
1k views

RAID 5 degraded performance

I'm currently rebuilding my fileserver, but because of SATA port limitations, I can only use 5 disks at a time. I've remove a drive from my original RAID, so I've been able to create a new degraded ...
Barium Scoorge's user avatar
2 votes
0 answers
590 views

Rebuilding a RAID 1 without data loss, recover from unallocated partition data

Mobo: ASUS P8Z77-M/Pro Gen 3 RAM: 32GB (4 x 8GB) Power Supply: corsair HX850 HDDs:Configuration before the problem: 1 x 128GB SSD for Windows 7 professional 64-bit 2 x 3TB drives in RAID 1 on the ...
Photocor's user avatar
0 votes
3 answers
3k views

Error on rebuilding Linux raid-1

I have a Linux box which acts as a home NAS with 2 x 1 TB HDDs in Linux RAID-1. Recently one of two drives failed, so I bought a new one (1TB WD Blue) and put it on. Rebuilding starts and stops at 7....
user avatar
2 votes
1 answer
6k views

Assembling an mdadm array with "possibly out of date" disks

I've recently moved house and have had some power problems after switching on my file server that's using a mdadm RAID5 set up. The file system I'm using is ext4. It seems that at some point two (of ...
Travis's user avatar
  • 21
0 votes
1 answer
2k views

Running multiple RAID-1 arrays on the same server

Is it possible to run multiple RAID-1's on the same machine? I have the following Motherboard: http://www.newegg.com/Product/Product.aspx?Item=N82E16813182251 Would I need to get RAID cards?
Jason's user avatar
  • 4,056
1 vote
0 answers
229 views

SATA-II SSD Raid 0 slow on Windows-7

I have 2 SSDs and made a RAID 0 with the on-board controller of my mainboard. But i only get 130 megabyte/second average read/write speed which seems to be pretty slow for me even for SATA 2 which ...
Philipp Sander's user avatar
1 vote
2 answers
983 views

/dev partition missing, so mdadm broken. How to get Linux to see partition?

Upgraded a Linux box and changed out the root drives. There was a RAID-5 array of three SATA drives that I moved over (not root). Reinstalled the OS but was CentOS 6.4 before and after. # mdadm --...
raindog308's user avatar
1 vote
0 answers
696 views

Create a mdadm raid mirror of an existing lvm

Hello I'm trying to figure out how I can create a pretty strange mdadm mirror of my lvm. I have 4 disks, (sda,b,c,d). Each disk has 2 partitions: 1Gb - physical volume 500mb - Swap My system lvm ...
glisignoli's user avatar

1
29 30
31
32 33
48